Ruby on Rails - Devise - Send sign up confirmation email on action other than usual sign up

Using Devise, how can I send confirmation email (identical to signup email) on first password update (or on an action other than usual sign up)?

I did it by adding a condition to create method in confirmations_controller.rb

def create
  self.resource = resource_class.send_confirmation_instructions(resource_params)
  yield resource if block_given?

  if successfully_sent?(resource)
    respond_with({}, location: after_resending_confirmation_instructions_path_for(resource_name))
  else
    if <condition> then
     User.find_by_email(resource.email).send_confirmation_instructions
     respond_with({}, location: after_resending_confirmation_instructions_path_for(resource_name))
    else
      respond_with(resource)
    end
  end
end